Beyond the Boundary: I'll Be Here - Past Chapter recaps the anime's first season in which half-human, half youmu Akihito strikes up an unlikely companionship with Spirit World warrior Mirai - the sole survivor of a family with the power to employ their blood as weapons. Born of enemy clans, Akihito and Mirai end up forging a powerful bond in their fight against a common foe, but all-new work Future Arc sees their friendship falter. Unable to remember the events of Past Chapter following the film s finale, Mirai is disconnected from her friends but is also offered something that had previously been beyond her reach the chance to live a normal life.